KR20230106770A - A mixer in which heat is circulated, a movable apparatus for manufacturing asphalt mixture using the same, and a method for manufacturing asphalt mixture using the same, and an asphalt mixture produced therefrom - Google Patents

Abstract

A heat cycle mixer, a mobile asphalt mixture manufacturing device using the same, a manufacturing method thereof, and an asphalt mixture produced therefrom are introduced.
The mobile asphalt mixture manufacturing apparatus of the present invention includes a first hopper into which aggregate is introduced; a first supply conveyor belt installed under the first hopper to transfer the aggregate discharged from the first hopper; a second supply conveyor belt disposed at a rear end of the first supply conveyor belt and transporting the dried aggregate supplied from the first supply conveyor belt; an asphalt supply unit located on the path of the second supply conveyor belt and supplying asphalt onto the second supply conveyor belt; a mixer unit for heating and mixing the aggregate and asphalt supplied from the second supply conveyor belt; A burner for primary combustion of fuel so that combustion gas for heating aggregate and asphalt can be supplied to the mixer unit, one side is in communication with the burner, the other side is open, and an air supply port is formed so that outside air can flow into the burner Doe, a combustion chamber for secondary combustion by mixing the combustion gas generated by primary combustion in the burner and outside air introduced from the air supply port, and the combustion chamber is built in, and the inner wall and the outside air can flow A flow passage is formed between the combustion chambers, and a main chamber in which external air introduced along the flow passage between the open other end of the combustion chamber and an inner wall thereof and secondary combustion combustion gas are mixed for tertiary combustion; a heating unit including a blower for supplying outside air to the flow path of the main chamber; And the first hopper, the first supply conveyor belt, the second supply conveyor belt, the asphalt supply unit, and the mixer unit are sequentially installed on the upper part along the moving direction of the aggregate and asphalt, and the main trailer is equipped with moving means on both sides to be movable. includes;

Description

Heat cycle mixer, mobile asphalt mixture manufacturing apparatus and manufacturing method using the same, and asphalt mixture. {A mixer in which heat is circulated, a movable apparatus for manufacturing asphalt mixture using the same, and a method for manufacturing asphalt mixture using the same , and an asphalt mixture produced therefrom}

The present invention relates to a thermocycling mixer, a mobile asphalt mixture manufacturing device using the same, a method for manufacturing the same, and an asphalt mixture prepared therefrom, and more particularly, relates to a road surface that is easy to move and improves asphalt adhesion and compaction density. A mobile asphalt mixture manufacturing device capable of preparing an asphalt mixture while heating and laying and compacting the prepared asphalt mixture on a heated road surface, a method for manufacturing the same, an asphalt mixture prepared therefrom, and a heat cycle mixer used therefor will be.

In general, road pavement is paved using cement or asphalt, and when there is a need to quickly open a road, an asphalt pavement method is mainly applied.

Asphalt pavement is inferior in durability compared to cement pavement, has a relatively high possibility of plastic deformation in summer, and has a high possibility of road surface damage such as potholes during rain, so there are disadvantages that require frequent repair of roads.

Such asphalt pavement is mainly made using a fixed asphalt manufacturing facility, and after heating the road surface and cutting the heated part, the cut material is mixed with new asphalt concrete or new aggregate, asphalt and additives and laid on the cut road surface part. Repackaging is carried out in this way.

At this time, the asphalt mixture produced in the stationary asphalt manufacturing facility is transported by a dump truck. In particular, in the winter season, the temperature of the surface in contact with the outside air decreases during the transportation process, resulting in a temperature difference between the entire asphalt mixture. The compaction deviation is generated according to the temperature difference, which acts as a cause of defects such as potholes and road damage.

Accordingly, in order to solve the above problems, an insulated dump truck or a material transfer vehicle (MTV) has been developed, but it is expensive and needs to be insulated throughout transporting the asphalt mixture, which increases the cost of paving.

Accordingly, the inventors of the present invention have developed "a mobile asphalt mixture manufacturing device, an asphalt mixture prepared using the same, a manufacturing method thereof, and a construction method using the mobile asphalt mixture manufacturing device" in order to solve the above problems.

However, since the heating means for preparing the asphalt mixture is limited to the mixer, the amount of heating heat is insufficient, and when using aggregate with high moisture, it takes a long time to dry the aggregate, resulting in a decrease in productivity.

For reference, the amount of heat required to convert 1 kg of water (100 ° C) into steam is 538 kcal / hr (specific heat of water 1), and the amount of heat required to raise the temperature of 1 kg of aggregate by 1 ° C is 0.2 kcal / hr (specific heat of aggregate 0.2), in order to improve the productivity of the asphalt mixture, it is urgent to develop a technology capable of heating the aggregate after first removing moisture.

The matters described as the above background art are only for improving understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

KR 10-1971865 B1 (2019.04.18.)

The present invention has been made to solve the above problems, and is a mobile type that can pave a road by preparing an asphalt mixture on the spot while having excellent mobility, and can easily manage the temperature of the prepared asphalt mixture. An apparatus for producing an asphalt mixture is provided.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description of the present invention.

The heat cycle mixer of the present invention includes a mixer unit for mixing while heating the aggregate and asphalt, or tonback half ascon supplied from the conveyor belt; And a burner for primary combustion of fuel so that combustion gas for heating aggregate and asphalt can be supplied to the mixer unit, one side is in communication with the burner and the other side is open, and an air supply port so that outside air can flow into the burner. Formed, a combustion chamber for secondary combustion by mixing the combustion gas generated by the primary combustion in the burner and the outside air introduced from the air supply port, the combustion chamber is built in, and the inner wall and A main chamber in which a flow passage is formed between the combustion chambers, and external air introduced along the flow passage between the open other end of the combustion chamber and its inner wall is mixed with secondary combustion combustion gas for tertiary combustion; and a heating unit including a blower for supplying outside air to the flow path of the main chamber.

The mixer unit may include a screw mixer that receives the aggregate and asphalt and transfers the introduced aggregate and asphalt while primarily heating them to prepare an asphalt mixture; a main mixer that receives combustion gas from the heating unit and receives aggregate and asphalt from the screw mixer and mixes them while secondary heating; and an exhaust pipe for discharging the combustion gas supplied into the main mixer, wherein the heating unit further includes a recovery pipe branched from the exhaust pipe and connected to the main chamber and having the blower installed on a path. The combustion gas discharged from the exhaust pipe is supplied to the main chamber and the combustion chamber together with fresh air absorbed from the blower, and the unburned gas is used for re-combustion, secondary combustion, and tertiary combustion.

The mobile asphalt mixture manufacturing apparatus of the present invention includes a first hopper into which aggregate is introduced; a first supply conveyor belt installed under the first hopper to transfer the aggregate discharged from the first hopper; a second supply conveyor belt disposed at a rear end of the first supply conveyor belt and transporting the dried aggregate supplied from the first supply conveyor belt; an asphalt supply unit located on the path of the second supply conveyor belt and supplying asphalt onto the second supply conveyor belt; a mixer unit for heating and mixing the aggregate and asphalt supplied from the second supply conveyor belt; A burner for primary combustion of fuel so that combustion gas for heating aggregate and asphalt can be supplied to the mixer unit, one side is in communication with the burner, the other side is open, and an air supply port is formed so that outside air can flow into the burner Doe, a combustion chamber for secondary combustion by mixing the combustion gas generated by primary combustion in the burner and outside air introduced from the air supply port, and the combustion chamber is built in, and the inner wall and the outside air can flow A flow passage is formed between the combustion chambers, and a main chamber in which external air introduced along the flow passage between the open other end of the combustion chamber and an inner wall thereof and secondary combustion combustion gas are mixed for tertiary combustion; a heating unit including a blower for supplying outside air to the flow path of the main chamber; And the first hopper, the first supply conveyor belt, the second supply conveyor belt, the asphalt supply unit, and the mixer unit are sequentially installed on the upper part along the moving direction of the aggregate and asphalt, and the main trailer is equipped with moving means on both sides to be movable. includes;

The mixer unit may include a screw mixer that receives the aggregate and asphalt and transfers the introduced aggregate and asphalt while primarily heating them to prepare an asphalt mixture; a main mixer that receives combustion gas from the heating unit and receives aggregate and asphalt from the screw mixer and mixes them while secondary heating; and an exhaust pipe for discharging the combustion gas supplied into the main mixer, wherein the heating unit further includes a recovery pipe branched from the exhaust pipe and connected to the main chamber and having the blower installed on a path. The combustion gas discharged from the exhaust pipe is supplied to the main chamber and the combustion chamber together with fresh air absorbed from the blower, and the unburned gas is used for re-combustion, secondary combustion, and tertiary combustion.

The first hopper, into which new aggregate is put, is characterized in that it is installed in the front upper part of the main trailer, and the second hopper into which waste aggregate and additives generated at the site are put; And a third supply conveyor belt installed on one side of the second hopper and transporting the waste aggregate put into the second hopper to the second conveyor belt, wherein the first hopper separates and inputs the aggregate and the additive. It is characterized in that it is partitioned into a plurality of pieces based on the partition wall.

It further includes an auxiliary trailer having moving means installed on both sides so as to be integrally coupled with the main trailer and moving, and having the second hopper and the third supply conveyor belt installed thereon.

The present invention further includes a dryer having inlets and outlets formed on both sides and removing moisture by heating the aggregate introduced into the inside, wherein the dryer is provided in a tube shape with both ends open, on the top of the main trailer A dryer body that is rotatably installed; a dryer burner generating hot air to heat the dryer body; and dryer circulation passages connected to both ends of the dryer body to circulate the hot air generated by the dryer burner.

The asphalt supply unit includes an asphalt tank in which asphalt is accommodated; and an asphalt burner installed at one side of the asphalt tank to heat the inside of the asphalt tank.

The present invention may further include a road surface heating unit installed under the main trailer to heat the road surface on which the asphalt mixture is laid.

The road surface heating unit is provided in the shape of a housing with an open lower side and a road surface heating body installed under the main trailer; and a road surface heating burner installed on one side of the road surface heating body to supply hot air to the inside of the road surface heating body.

The screw mixer may be arranged such that a plurality of the conveying screws are stacked in a height direction and alternately rotated in horizontal forward and reverse horizontal directions.

The asphalt mixture manufacturing method of the present invention includes the steps of preparing waste aggregate or preparing new aggregate by spraying a regeneration additive when cutting a road surface; A process of primary heating while mixing the prepared waste aggregate and new aggregate; The process of preparing asphalt by heating; preparing a primary mixture by mixing heated asphalt and aggregate while secondary heating; and preparing an asphalt mixture by mixing the primary mixture while heating it tertiary, wherein the reclaimed additive is SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), EVA (Ethylene) -Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene), rosin, wax, process oil, and at least one of rubber powder, and the process of preparing the asphalt mixture includes fuel After generating combustion gas by primary combustion in a burner, the combustion gas is supplied to a combustion chamber connected to the burner and additional external air is supplied to the combustion chamber for secondary combustion, and secondary combustion discharged from the combustion chamber It is characterized in that additional external air is supplied to the combustion gas to supply the tertiary combustion combustion gas to the mixer, and the primary mixture is introduced into the mixer and mixed while heating using the tertiary combustion combustion gas.

In the process of producing the asphalt mixture, after heating the primary mixture using the combustion gas burned thirdly in the mixer, the thirdly burned combustion gas is discharged through an exhaust pipe, and the combustion gas discharged through the exhaust pipe It is characterized in that some of them are mixed with outside air and used in secondary combustion and tertiary combustion processes.

The asphalt mixture of the present invention is characterized in that it is produced by the above-mentioned production method.

According to an embodiment of the present invention, an asphalt mixture can be produced and laid in the field, and a good quality asphalt mixture can be produced, especially in terms of temperature management.

In addition, there is an advantage in that various types of asphalt mixtures can be prepared according to site conditions.

In addition, by heating the road surface before pavement, there is an effect of improving the compaction and adhesiveness of the asphalt mixture to improve the pavement quality, and in particular, there is an effect of preventing problems caused by cold road surfaces in winter or cold regions. .

In addition, by producing and laying the asphalt mixture directly on site, there is an advantage in securing temperature uniformity, securing road surface adhesion and compaction to maintain quality, as well as solving the cause of potholes generated after existing asphalt laying.

In addition, by heating the asphalt and the aggregate while sufficient combustion is performed in the screw mixer, there is an effect of improving fuel efficiency and improving the productivity of the asphalt mixture.

1 is a view schematically showing a mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention,
2 is a view showing a first hopper divided by partition walls according to an embodiment of the present invention;
3 is a view showing a heating unit according to an embodiment of the present invention,
4 is a cross-sectional view of a mixer unit and a heating unit viewed from above according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and descriptions may be made by citing contents described in other drawings under these rules, and contents determined to be obvious to those skilled in the art or repeated contents may be omitted.

In order to easily manage the temperature of the asphalt mixture, the present invention manufactures an asphalt mixture on the spot using new aggregate or an aggregate prepared by mixing new aggregate and waste aggregate generated at the site, and immediately after preparing the asphalt mixture. Its main feature is to improve the pavement quality of roads by allowing road pavement to be made.

1 is a view schematically showing a mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention includes a first hopper 100 into which aggregate is introduced, and a first hopper 100 which transfers aggregate discharged from the first hopper 100. A supply conveyor belt 200, a dryer 300 for primary heating while drying moisture in the aggregate, a second supply conveyor belt 400 for transporting the dry aggregate discharged from the dryer 300, and a second supply conveyor An asphalt supply unit 500 for adding asphalt to the aggregate transported along the belt 400, and a mixer unit 600 for preparing an asphalt mixture by mixing and heating the aggregate and asphalt transported along the second supply conveyor belt 400. ) and a heating unit 700 for suppressing hardening of the asphalt mixture by supplying heated combustion air to the mixer unit 600.

At this time, the dryer 300 is detachably coupled to the main trailer 10 as needed, and when the dryer 300 is removed, the first supply conveyor belt 200 transfers the aggregate directly to the second supply conveyor belt ( 400) is configured to supply.

The first hopper 100 according to an embodiment of the present invention is preferably disposed forward in the traveling direction of the main trailer 10, because the first hopper 100 is composed of aggregate, which is the material of the asphalt mixture. This is because it is possible to reduce manufacturing cost by facilitating temperature control by minimizing unnecessary transportation of the asphalt mixture or its material by placing the asphalt mixture to be completed toward the rear of the main trailer 10 to the input location.

2 is a view showing a first hopper divided by partition walls according to an embodiment of the present invention.

As shown in FIG. 2, it is preferable that the first hopper 100 according to an embodiment of the present invention is divided into a plurality of regions by one or more partition walls 110, because one first hopper This is because new aggregate, waste aggregate, and various additives can be separately injected into (100), so that the operation can be performed smoothly.

Various additives may be injected through the first hopper 100, or may be sprayed (recycled additives) in the process of cutting the road surface to prepare waste aggregate.

In the present invention, additives such as fillers, modifying additives, process oils, and elastic chips may be used. The fillers are made of one or more selected from among cement, slaked lime, and quicklime, and the process oils include aroma oil, paraffin oil, and naphtha. It is prepared by including any one or more selected from among oils.

The additives of the present invention are not limited to the additives listed above, and various additives may be selectively used according to requirements such as PG grade and specifications of paved roads to be paved.

More preferably, the mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention is a second hopper 800 into which waste aggregate and additives generated on the site and the waste aggregate of the second hopper 800 are added to the dryer 300 ) It may further include a third supply conveyor belt 900 for transporting.

At this time, when the dryer 300 is removed, the third supply conveyor belt 200 is configured to directly supply the waste aggregate to the second supply conveyor belt 400 .

At this time, it is preferable to input new aggregate through the first hopper 100 and waste aggregate through the second hopper 800, because the amount of new aggregate and waste aggregate can be easily adjusted. This is because the operation of the dryer 300 can be controlled due to the difference in moisture content between the waste aggregate and the new aggregate.

Specifically, since a watering cutting method is usually used when preparing waste aggregate by cutting a road surface in the field, the prepared waste aggregate may contain a large number of moisture, so that it can be adjusted so that it is divided into new aggregate and injected as necessary.

Accordingly, the operation of the dryer 300 can be selectively controlled according to the moisture content of the aggregate introduced into the dryer 300, thereby preventing an increase in cost due to unnecessary heating.

At this time, a first waste aggregate outlet is provided on one side of the second hopper 800, and the third supply conveyor belt 900 transfers the waste aggregate discharged through the first waste aggregate outlet to the dryer 300.

In addition, the second hopper 800 according to an embodiment of the present invention has a second waste aggregate outlet formed on the surface facing the first waste aggregate outlet, and a direction from the first waste aggregate outlet to the second waste aggregate outlet therein. It may further include a waste aggregate screen (not shown) provided with a downward slope.

Accordingly, the waste aggregate injected into the second hopper 800 is sorted according to the particle size, and the waste aggregate included in the standard particle size passes through the waste aggregate screen and is discharged through the first waste aggregate discharge port, and the third supply conveyor belt 900 It is transferred to the dryer 300 along the , and the waste aggregate that does not satisfy the standard particle size is discharged to the outside of the second hopper 800 through the second waste aggregate discharge port along the waste aggregate screen formed with a downward slope.

Accordingly, the quality of the asphalt mixture produced can be improved and the quality of the pavement can be improved by having the operator go through a separate crushing process and then reintroducing it into the second hopper 800 or performing a screening process.

Also, in the present invention, the second hopper 800 may be partitioned into a plurality of pieces through a partition wall or the like so that waste aggregate and additives may be selectively introduced by type, similarly to the first hopper 100 described above.

More preferably, in one embodiment of the present invention, the mobile asphalt mixture manufacturing device is provided to be selectively coupled to the main trailer 10, and moving means are provided on both sides so that it can be moved along the main trailer 10 An auxiliary trailer 20 may be further included.

At this time, the second hopper 800 and the third supply conveyor belt 900 may be installed on the auxiliary trailer 20 and combined with the main trailer 10 to be integrally configured. At this time, the third supply conveyor belt 900 ) is preferably installed so that the inclination angle can be adjusted so that the waste aggregate can be supplied to the inlet of the dryer 300 installed on the main trailer 10.

Accordingly, the inclination angle of the third supply conveyor belt 900 can be adjusted according to conditions such as the size and position of the dryer 300 installed on the main trailer 10, so that the assembly can be smoothly performed.

In the present invention, the transport means installed on both sides of the main trailer 10 and the auxiliary trailer 20 are various transport means capable of moving the main trailer 10 and the auxiliary trailer 20 such as wheels, wheels, and rollers. can be applied

The dryer 300 according to an embodiment of the present invention is for removing moisture contained therein by primary heating of aggregate made of waste aggregate or new aggregate, and a dryer body 310 provided in a tube shape with both ends open And, the dryer burner 320 for heating the dryer body 310 by generating hot air to dry the aggregate accommodated in the dryer body 310 and the dryer circulation passage 330 for circulating the hot air generated by the dryer burner 320 consists of

The dryer body 310 has an aggregate inlet formed in the front of the main trailer 10 and an aggregate outlet formed in the rear of the main trailer 10 .

At this time, it is preferable that the dryer body 310 is rotatably installed to smoothly move and dry the aggregate.

The dryer circulation passage 330 according to an embodiment of the present invention is configured to be connected to both ends of the dryer body 310 so as to connect the aggregate inlet and the aggregate outlet, and the dryer burner 320 is on the dryer circulation passage 330 installed on

Accordingly, the hot air generated by the dryer burner 320 is supplied to the aggregate inlet of the dryer body 310 along the dryer circulation passage 330, and moves toward the aggregate outlet together with the aggregate while primarily heating and drying the aggregate.

At this time, the hot air whose temperature is lowered while heating the aggregate is reheated by the dryer burner 320 while moving through the dryer circulation passage 330 installed at the aggregate outlet and re-supplied to the dryer body 310 through the aggregate inlet.

Accordingly, the dryer burner 320 partially recovers hot air having a higher temperature than that of the surrounding area, reheats the air, and supplies it, thereby minimizing energy consumption and further reducing manufacturing costs.

In the present invention, new aggregate, waste aggregate, or a mixture of new aggregate and waste aggregate may be used as the aggregate, and the mixing ratio may be adjusted according to the characteristics of the road to be paved.

Aggregate dried as described above is transported along the second supply conveyor belt 400 to the mixer unit 600 installed at the rear of the main trailer 10. At this time, the second supply conveyor belt 400 has a minimum length. It is desirable to install it in length.

The reason is that by minimizing the cooling of the first heated aggregate exposed to the atmosphere while drying, it is possible to reduce the cost of the second or third heating.

Meanwhile, the asphalt supply unit 500 according to an embodiment of the present invention is installed near the second supply conveyor belt 400 to supply primarily heated asphalt to aggregates transported along the second supply conveyor belt 400. do.

More specifically, the asphalt supply unit 500 includes an asphalt tank 510 in which asphalt is accommodated and an asphalt burner 520 installed on one side of the asphalt tank 510 to heat the asphalt accommodated in the asphalt tank 510.

Accordingly, when preparing the asphalt mixture, the asphalt burner 520 primarily heats the asphalt contained in the asphalt tank 510 and supplies it to the second supply conveyor belt 400 .

More preferably, the asphalt tank 510 preferably further includes an asphalt stirring means (not shown) for stirring the asphalt therein so that the asphalt accommodated therein is evenly heated.

As described above, the primarily heated aggregate and asphalt are transferred to the mixer unit 600 along the second supply conveyor belt 400 .

The mixer unit 600 heats and mixes the aggregate and asphalt mixture to prepare an asphalt mixture. It consists of a main mixer 620 that is disposed and mixes the aggregate and asphalt supplied from the screw mixer 610 while secondary heating to prepare an asphalt mixture.

3 and 4 are cross-sectional views illustrating a mixer unit and a heating unit according to an embodiment of the present invention.

As shown in FIGS. 3 and 4 , the screw mixer 610 according to an embodiment of the present invention is configured by installing a conveying screw 611 for conveying aggregate and asphalt inside an adiabatic body.

At this time, it is preferable that a heat insulation layer such as glass fiber is formed on the inside of the body surrounding the transfer screw 611. The reason is that by preventing the primarily heated asphalt and aggregate from being cooled by outside air, the prepared asphalt mixture This is because it can improve quality and increase productivity.

In the present invention, the screw mixer 610 may be provided in a multi-layer structure of one or two or more layers according to the production requirements of the mixture of aggregate and asphalt. At this time, it is preferable that the screw mixers 610 adjacent to each other are installed to transfer the aggregate and asphalt in opposite directions to move the aggregate and asphalt mixture in a zigzag direction.

Accordingly, the aggregate and the asphalt are mixed and moved in the forward direction along the plurality of conveying screws 611, mixed and transported again in the reverse direction, and mixed and moved again in the forward direction so that the asphalt and the aggregate can be sufficiently mixed.

In the present invention, the screw mixer 610 may adjust the number of conveying screws 611 according to the amount of the asphalt mixture to be produced.

Aggregate and asphalt mixed through the screw mixer 610 are supplied into the main mixer 620 and mixed while secondary heating to form an asphalt mixture.

In the present invention, the screw mixer 610 and the asphalt mixture are heated using the combustion gas (G) supplied from the heating unit 700, which will be described in detail in the description of the heating unit 700.

The heating unit 700 is installed on the side of the screw mixer 610, and mixes the exhaust gas discharged from the chamber 710 and the main mixer 620 with the flow passage 711 therein, and the outside air to form the chamber 710. ), a blower 720 for supplying air to the flow passage 711, a combustion chamber 730 installed inside the chamber 710 and receiving air from a plurality of positions from the flow passage 711, and air and fuel It is configured to include a burner 740 for supplying combustion gas G, which is ignited after mixing, into the combustion chamber 730.

At this time, the chamber 710 and the combustion chamber 730 are composed of a kind of double chamber, and the combustion chamber 730 divided by the partition wall 733 is provided inside the chamber 710, and the remainder except for the combustion chamber 730 is provided. The space functions as a flow passage 711 through which the air delivered from the blower 720 flows.

In addition, the flow passage 711 serves as a buffer that separates the combustion chamber 730 from the wall surface of the chamber 710, thereby preventing the combustion gas G inside the combustion chamber 730 from being cooled by the external air temperature. to perform the function of an insulating layer.

Through this, the combustion gas (G) flowing through the combustion chamber 730 can be supplied to the main mixer 620 while preserving the maximum amount of heat.

The burner 740 is installed outside the chamber 710 and supplies heated combustion gas (G) by igniting a mixture of air and a fuel such as oil or gas, for example. The burner 740 and the combustion chamber 730 are connected through a combustion pipe 741, and this combustion pipe 741 may be formed in a pipe shape penetrating the chamber 710.

As described above, the combustion chamber 730 has a flow path 711 provided therebetween so as to be spaced apart from the wall surface of the chamber 710, and the combustion pipe 741 is formed in a pipe shape penetrating the spaced distance. do.

The mixture of fuel and air ignited in the burner 740 is primarily burned in the combustion pipe 741 and increases in heat. However, since the burner 740 and the combustion pipe 741 have a relatively small volume and a short time for the combustion gas G to pass through these components, the combustion gas G is not completely burned and an incomplete combustion state is maintained. will do

Therefore, additional air is supplied to the combustion chamber 730 so that the incompletely burned combustion gas G can be completely burned to further increase the amount of heat.

That is, the air supply port 731 and the open area 732 are provided at separate locations spaced apart from each other in the partition wall 733 that partitions the combustion chamber 730. It is provided on one wall surface of the combustion chamber 730 connected to the combustion chamber 730, and the open area 732 is provided on the wall surface of the opposite end side of the combustion pipe 741.

In this way, the air supply port 731 and the open area 732 are provided in the partition wall 733 so that the air supplied from the blower 720 can flow into the combustion chamber 730 via the flow passage 711. .

The combustion gas (G) primarily burned in the combustion pipe 741 is diffused inside the combustion chamber 730 and reacts with the air supplied through the air supply port 731 to cause secondary combustion, and the combustion chamber While moving in the other direction of the 730, it reacts with the air supplied through the open area 732 again, and combustion is performed in a third order.

As the fuel is burned in three stages at the combustion pipe 741, one end of the combustion chamber 730, and the other end of the combustion chamber 730, the fuel is completely burned and the maximum amount of heat of the fuel can be extracted. , It is possible to reduce fuel consumption and supply hot air having the maximum amount of heat to the main mixer 620.

The completely burned combustion gas (G) flows into the main mixer 620 through the combustion gas supply port 734 formed at the lower end of the chamber 710, and heats the aggregate and asphalt introduced into the main mixer 620. This provides heat so that they can be well mixed while maintaining fluidity.

After heating the aggregate and asphalt, the combustion gas (G) is discharged to the outside through the exhaust pipe 621 installed in the main mixer 620, and some or all of the combustion gas (G) discharged to the exhaust pipe 621 is It flows into the blower 720 through the recovery pipe 721.

The blower 720 sucks the relatively high-temperature combustion gas G recovered through the recovery pipe 721 and some of the outside air, and introduces them back into the flow passage 711 of the chamber 710.

This is to recycle the heat remaining in the recovered combustion gas (G) and supply it to the main mixer 620 again, and to reheat the recovered combustion gas (G) in the combustion chamber 730 and return it to the main mixer 620. can be re-supplyed.

At this time, when only the recovered combustion gas (G) is injected into the combustion chamber 730 again, since the amount of oxygen in the combustion gas (G) is small, it is difficult to completely burn the fuel. supply oxygen Through this, it is possible to supply the heat of the combustion gas (G) to the main mixer 620 by maximally utilizing it.

As described above, since the asphalt mixture prepared in the main mixer is discharged from the rear end of the main trailer 10, the asphalt mixture can be laid on the road surface.

When the asphalt mixture is laid on the road surface as described above, it is compacted using a roller or the like and then cured to complete the road pavement.

More preferably, the mobile asphalt mixture manufacturing apparatus according to an embodiment of the present invention further includes a road surface heating unit 11 installed under the main trailer 10 to heat the road surface on which the asphalt mixture is laid.

More specifically, the road surface heating unit 11 includes a road surface heating body 11a having an open lower side and one or more road surface heating burners 11b installed on one side of the road surface heating receiver to supply hot air to the inside of the road surface heating body 11a. ).

Therefore, before the asphalt mixture is laid on the road surface, the road surface heating unit 11 preheats the road surface to be paved, so that the asphalt mixture laid on the road surface can be prevented from being damaged due to rapid temperature change or deterioration in adhesion to the road surface. There is an effect that can improve the packaging quality.

Hereinafter, a method for preparing an asphalt mixture according to an embodiment of the present invention will be described.

An asphalt mixture manufacturing method according to an embodiment of the present invention includes the steps of preparing waste aggregate, preparing aggregate by drying and mixing waste aggregate, new aggregate and additives, preparing asphalt, preparing asphalt and It includes a process of preparing a primary mixture while heating the aggregate and a process of preparing an asphalt mixture by mixing the primary mixture while heating it tertiary.

The process of preparing the waste aggregate may be prepared by cutting and crushing the road surface to be paved on site, and more specifically, the road surface cutting may use a water spray cutting method to prevent scattering of dust.

When the cutting of the road surface is completed, the cut road surface is crushed to a predetermined size according to the particle size of the aggregate set in advance to prepare waste aggregate.

When the waste aggregate is prepared as described above, new aggregate, waste aggregate, and additives are input through the first and second hoppers 100 and 800, respectively, and the input raw materials are fed along the first and third supply conveyor belts 200 and 900. It is transferred to the dryer 300.

In the present invention, the additive is SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), EVA (Ethylene-Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene) , rosin, wax, process oil, and at least one of rubber powder.

On the other hand, the waste aggregate injected into the second hopper 800 may be configured to be transported through the third supply conveyor belt 900 after additionally sorting the particle size through a screen installed therein.

As described above, when new aggregate, waste aggregate, and additives are supplied into the dryer body 310, the dryer heats and dries the new aggregate, waste aggregate, and additives using the dryer burner 320 and the dryer circulation passage 330 prepare the aggregate

The process of preparing the asphalt is provided by heating the asphalt accommodated in the asphalt tank 510 using the asphalt burner 520.

As described above, the heated aggregate and asphalt are loaded on the second supply conveyor belt 400 and transported to the screw mixer 610.

At this time, a plurality of screw mixers 610 are stacked in the height direction, arranged so as to be alternately rotated in the horizontal forward direction and horizontal reverse direction, and are provided to the upper screw mixer 610 through the second supply conveyor belt 400. The introduced material is supplied to the main mixer 620 while being mixed.

At this time, the main mixer 620 receives high-temperature combustion gas from the heating unit 700 and reheats the aggregate heated in the dryer 300 and the asphalt heated in the asphalt supply unit 500 to maintain fluidity and mix Helps. During this process, the heating unit 700 may supply additional air to the combustion gas several times to burn the fuel close to complete combustion.

Describing the combustion process in more detail, the primary combustion of the fuel is performed in the burner 740, and the combustion gas generated by the primary combustion is secondaryly combusted in the secondary interior of the combustion chamber 730, Combustion may be assisted by introducing new outside air into the combustion chamber 730 and additionally supplying oxygen.

Thereafter, external air is supplied to the combustion gas discharged from the secondary combustion in the combustion chamber 730 for tertiary combustion, and then the tertiary combustion combustion gas is supplied to the main mixer 620 so that the inside of the main mixer 620 The primary mixture of asphalt and aggregate is heated.

By burning the combustion gas three times in this way, it is possible to maximize the combustion rate and burn it close to the conversion combustion, and through this, it is possible to make the most of the heat of the fuel.

The tertiary combustion gas may be discharged to the outside through the exhaust pipe 621 after heating the primary mixture of asphalt and aggregate in the main mixer 620 .

Some of the combustion gas discharged through the exhaust pipe 621 may be mixed with outside air supplied to secondary combustion and tertiary combustion and then supplied to the combustion chamber 730 again.

In this way, by resupplying the exhausted combustion gas, the amount of heat remaining in the combustion gas can be recycled, and combustible materials volatilized from the asphalt are also burned together, thereby maximizing the amount of heat of the combustion gas supplied to the main mixer 620 It can be done.

The mixture prepared as described above is finally heated and mixed in the main mixer 620 to prepare an asphalt mixture, and the operation is finished.

As described above, although it has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

10: main trailer 11: road heating part
11a: road surface heating body 11b: road surface heating burner
20: auxiliary trailer 100: first hopper
200: first supply conveyor belt 300: dryer
310: dryer body 320: dryer burner
330: dryer circulation path 400: second supply conveyor belt
500: asphalt supply unit 510: asphalt tank
520: asphalt burner 600: mixer unit
610: screw mixer 620: main mixer
700: heating unit 710: main chamber
711: flow path 720: blower
730: combustion chamber 731: air supply port
732: open area 740: burner
741: combustion pipe 800: second hopper
900: third supply conveyor belt

Claims (14)

Mixer unit for heating and mixing the aggregate and asphalt, or tonback half asphalt supplied from the conveyor belt; and
A burner for primary combustion of fuel so that combustion gas for heating aggregate and asphalt can be supplied to the mixer unit, one side is in communication with the burner, the other side is open, and an air supply port is formed so that outside air can flow into the burner Doe, a combustion chamber for secondary combustion by mixing the combustion gas generated by primary combustion in the burner and outside air introduced from the air supply port, and the combustion chamber is built in, and the inner wall and the outside air can flow A flow passage is formed between the combustion chambers, and a main chamber in which external air introduced along the flow passage between the open other end of the combustion chamber and an inner wall thereof and secondary combustion combustion gas are mixed for tertiary combustion; A heat cycle mixer comprising a heating unit including a blower for supplying outside air to the flow path of the main chamber.
The method of claim 1,
the mixer,
A screw mixer that receives the aggregate and asphalt and transfers the introduced aggregate and asphalt while primarily heating them to prepare an asphalt mixture;
a main mixer that receives combustion gas from the heating unit and receives aggregate and asphalt from the screw mixer and mixes them while secondary heating; and
Including; exhaust pipe for discharging the combustion gas supplied into the main mixer,
the heating part,
Further comprising a recovery pipe branched from the exhaust pipe and connected to the main chamber, on which the blower is installed,
The combustion gas discharged from the exhaust pipe is supplied to the main chamber and the combustion chamber together with fresh air absorbed from the blower, and the unburned gas is used for re-combustion, secondary combustion, and tertiary combustion. mixer.
A first hopper into which aggregate is input;
a first supply conveyor belt installed under the first hopper to transfer the aggregate discharged from the first hopper;
a second supply conveyor belt disposed at a rear end of the first supply conveyor belt and transporting the dried aggregate supplied from the first supply conveyor belt;
an asphalt supply unit located on the path of the second supply conveyor belt and supplying asphalt onto the second supply conveyor belt;
a mixer unit for heating and mixing the aggregate and asphalt supplied from the second supply conveyor belt;
A burner for primary combustion of fuel so that combustion gas for heating aggregate and asphalt can be supplied to the mixer unit, one side is in communication with the burner, the other side is open, and an air supply port is formed so that outside air can flow into the burner Doe, a combustion chamber for secondary combustion by mixing the combustion gas generated by primary combustion in the burner and outside air introduced from the air supply port, and the combustion chamber is built in, and the inner wall and the outside air can flow A flow passage is formed between the combustion chambers, and a main chamber in which external air introduced along the flow passage between the open other end of the combustion chamber and an inner wall thereof and secondary combustion combustion gas are mixed for tertiary combustion; a heating unit including a blower for supplying outside air to the flow path of the main chamber; and
The first hopper, the first supply conveyor belt, the second supply conveyor belt, the asphalt supply unit, and the mixer unit are sequentially installed on the upper part along the moving direction of the aggregate and asphalt, and equipped with moving means on both sides so as to be movable Main trailer; Containing, mobile asphalt mixture manufacturing apparatus.
The method of claim 3,
the mixer,
A screw mixer that receives the aggregate and asphalt and transfers the introduced aggregate and asphalt while primarily heating them to prepare an asphalt mixture;
a main mixer that receives combustion gas from the heating unit and receives aggregate and asphalt from the screw mixer and mixes them while secondary heating; and
Including; exhaust pipe for discharging the combustion gas supplied into the main mixer,
the heating part,
Further comprising a recovery pipe branched from the exhaust pipe and connected to the main chamber, on which the blower is installed,
The combustion gas discharged from the exhaust pipe is supplied to the main chamber and the combustion chamber together with fresh air absorbed from the blower, and the unburned gas is used for re-burning, secondary combustion, and tertiary combustion, characterized in that, the mobile asphalt mixture manufacturing device.
The method of claim 3,
The first hopper,
Characterized in that the new aggregate is introduced and installed at the front upper part of the main trailer,
A second hopper into which waste aggregate and additives generated at the site are input; and
A third supply conveyor belt installed on one side of the second hopper to transfer the waste aggregate put into the second hopper to the second conveyor belt; further comprising,
The mobile asphalt mixture manufacturing apparatus, characterized in that the first hopper is divided into a plurality based on the partition wall so that the aggregate and the additive can be separately introduced.
The method of claim 5,
Moving means are installed on both sides so as to be integrally combined with the main trailer and movable, and the second hopper and the third supply conveyor belt are installed on the auxiliary trailer; further comprising a mobile asphalt mixture manufacturing apparatus.
The method of claim 3,
A dryer having an inlet and an outlet formed on both sides, and removing moisture by heating the aggregate introduced into the inside; further comprising,
The dryer,
a dryer body provided in a tube shape with both ends open and rotatably installed above the main trailer;
a dryer burner generating hot air to heat the dryer body; and
Mobile asphalt mixture manufacturing apparatus comprising a; dryer circulation flow path connected to both ends of the dryer body at both ends so as to circulate the hot air generated by the dryer burner.
The method of claim 3,
The asphalt supply unit,
An asphalt tank in which asphalt is accommodated; and
A mobile asphalt mixture manufacturing apparatus comprising: an asphalt burner installed on one side of the asphalt tank to heat the inside of the asphalt tank.
The method of claim 3,
A mobile asphalt mixture manufacturing apparatus further comprising a; road surface heating unit installed under the main trailer to heat the road surface on which the asphalt mixture is laid.
The method of claim 9,
The road surface heating unit,
A road surface heating body provided in the shape of a housing with an open lower side and installed under the main trailer; and
A mobile asphalt mixture manufacturing apparatus comprising a; road surface heating burner installed on one side of the road surface heating body to supply hot air to the inside of the road surface heating body.
The method of claim 4,
The screw mixer,
A plurality of the conveying screws are stacked in the height direction, characterized in that arranged to rotate alternately in the horizontal forward direction and horizontal reverse direction, mobile asphalt mixture manufacturing apparatus.
A process of preparing waste aggregate or preparing new aggregate by spraying a recycled additive when cutting a road surface;
A process of primary heating while mixing the prepared waste aggregate and new aggregate;
The process of preparing asphalt by heating;
preparing a primary mixture by mixing heated asphalt and aggregate while secondary heating; and
Including; preparing an asphalt mixture by mixing the primary mixture while heating it tertiary,
The regeneration additives are SBS (Styrene-Butadiene-Styrene copolymer), SIS (Styrene-Isoprene-Styrene copolymer), EVA (Ethylene-Vinyl-Acetate), LDPE (Low-density polyethylene), HDPE (High-density polyethylene), It contains at least one of rosin, wax, petroleum resin, process oil, and rubber powder,
In the process of preparing the asphalt mixture, after primary combustion of fuel in a burner to generate combustion gas, the combustion gas is supplied to a combustion chamber connected to the burner, and additional outdoor air is supplied to the combustion chamber for secondary combustion, , Additional outside air is supplied to the secondary burned combustion gas discharged from the combustion chamber to supply the third burned combustion gas to the mixer, and the primary mixture is injected into the mixer to use the third burned combustion gas. A method for producing an asphalt mixture, characterized in that mixing while heating.
The method of claim 12,
The process of preparing the asphalt mixture,
After heating the primary mixture using the combustion gas thirdly combusted in the mixer, the thirdly combusted combustion gas is discharged through an exhaust pipe,
Characterized in that a part of the combustion gas discharged through the exhaust pipe is mixed with outside air and used in the secondary combustion and tertiary combustion processes, the asphalt mixture manufacturing method.
An asphalt mixture prepared by the method of any one of claims 12 or 13.

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